Dynamic Analysis for Chatter in Mills and Artificial Muscle — Lesson 2

This lesson covers the applications of non-linear vibration, focusing on its use in energy harvesting, passive and active vibration absorption, and turning problems. The lesson delves into the application of non-linear vibration in cold rolling mills and artificial muscles. It discusses the concept of chatter in cold rolling mills, the parameters affecting it, and ways to avoid it. The lesson also explores different types of chatter regimes and their frequency ranges. It further discusses the works of various researchers in the field and the mathematical modeling of the rolling mill model. The lesson concludes with the explanation of the roll byte model and the calculation of the resultant sheet deformation force.

Video Highlights

01:28 - Introduction
08:28 - Mathematical Model
22:45 - Results and discussions
35:00 - Harmonically and parametrically excited PAM

Key Takeaways

- Non-linear vibration has various applications including energy harvesting, vibration absorption, and turning problems.
- Chatter in cold rolling mills is a significant issue that affects product quality. It becomes more dominant as rolling speed increases.
- There are three types of chatter regimes in cold rolling mills, each characterized by their frequency range.
- Various researchers have contributed to the understanding of chatter in rolling mills, each proposing different models and theories.
- Mathematical modeling is a crucial tool in understanding and predicting the behavior of rolling mills.
- The roll bite model helps in understanding the stress acting on the sheet and the resultant sheet deformation force